Casing shoe



' 4Feb. 1, 1944. R A, TlEMANN 42,340,406

GASING SHOE Filed Nov. 14, 1940 Patented Feb. 1, 1944 UNITED STATES PATENT OFFICE f 'I `2,340,406 n j v v `CASING SHOE Ralph A. Tiemann, Los Angeles, Calif., assignox` to Larkin Packer Company, St. Louis, Mo., a corporation of Missouri Application November 14, 1940, Serial No. 365,618

` (o1. ite-9) 3 Claims.

Thisinvention pertains to casing shoes such as are used in deep wells for the lower end of the casing while being lowered into the well. More particularly, the invention pertains to socalled well washing shoes, such as are provided with means for washing or ilushing out the borehole with water or other liquid.

One of the objects of this invention is to provide such a shoe which will be capable of delivering a large volume of water or washing liquid in a suitable direction with respect to the casing for properly ushing or washing the hole.

Further objects will appear from the following description, taken in connection with the accompanying drawing, in which:

Figure 1 is a central vertical section of a casing shoe embodying this invention;

Figure 2 is a fragmentary view partly in elevation and partly in section, illustrating another embodiment of this invention;

Figure 3 is a horizontal section taken on line 3 3 of Figure 2; Y

Figure 4 is a view similar to FigureZ, illustrating another embodiment of this invention; and

Figure 5 is a similar view illustrating another embodiment of the invention.

Referring now to the drawing, I designates the body of the casing shoe. This is usually constructed of steel and is provided with threads 2 by which it may be connected `to the lower end of the casing. Within the body or shell I there may be provided a lining 3, which is-often constructed of such material as concrete. Within the lining 3 there is provided an inner longitudinal iiuid passage 4, which-may be constricted at its lower end, as in the embodiment illustrated, to provide an outlet part or nozzle 5, or which may be closed entirely at its lower end. The lower end of the shell I may be provided with a guide Ii, which is tapered inwardly so as to ride over obstructions when the casing is lowered into the well. This guide may be constructed of any suitable material. Cast iron, aluminum, concrete, and Bakelite have been used for this purpose.

In accordance with this invention a groove or annular recess 'I is formed in the outer portion of the body I. This recess is placed in communication with the inner longitudinal passage 4 by means of one or more lateral ports 8.' In the embodiment illustrated, these ports extend through the lining 3 and the body I, opening into the recess I at their outer ends. A wall of the recess is beveled or formed conically to extend axially and radially of the body.

' In the embodiment of Figure 1, a shoulder 9 is formed on the body I above the recess l, and an annular band I0 of steel or other suitable rigid material and flush with the body, is placed around the body so as to seat upon the shoulder 9, being secured by welding or otherwise.. This band Il) provides a baffle extending part way over the outer portion of the recess 1. The free (in this case) lower end of this band is also beveled or formed conically and is spaced from the beveled lower wall of the recess 'I to provide an annularly extending opening II.` This forms an annularly and concally extending jet outlet or passage for the flushing water to direct it axially'and radially. This water is pumped down the casing into the passage 4 and then moves outwardly through the passages 8 into the recess 1, wherein it is distributed around the shell I and issues from the annular outlet II in the form of anannular conical sheet jet at a sub.- stantial velocity in accordance with the fluid pressure provided. It will be noted that this jetv issues in a downward direction at an acute angle to the axis of the casing. Accordingly, this jet,- will impinge upon the sides of the hole at alli points surrounding the shoe.

It will be noted that in the structure of Figa ure 1 the positions of the recess 'I and the baille I0 may be reversed; that is, the shoulder 9 may be formed at the bottom of the recess I with the baille It seated thereon and the opening Il will then be at the top edge of the baille. With this arrangement the issuing jet will be projected upwardly at an acute angle to the axis of the shoe. Inthis manner the invention may be applied to provide a washing shoe which projects the liquid either upwardly or downwardly at a suitable angle.

In the embodiment illustrated in Figures 2 and 3, the device may be so arranged that annular conical sheet jets may be projected both upwardly and downwardly at suitable angles to the shoe axis. In this arrangement the recess 'I is provided with beveled edges I2 at both top and bot tom, to provide opposed conical walls. The bafe I3, corresponding to the baffle I0 of Figure 1, takes the form of a band having beveled edges at its top and bottom. Spaced along the inside of the band are spacer blocks I4 of any suitable form, operating to maintain the band I3 at a. uniform distance from the bottom of the recess l. This provides beneath the band a space in which the water issuing from the ports 8 may circulate so as to reach all portions of that space. This water issues from both openings I and I6, providing annular sheet jets, projected both upwardly and downwardly, at suitable inclinations to the axis of the shoe.

The band I3 may be secured in its position with respect to the shell I, if desired, by means of screws I I or other suitable fastening devices. In this embodiment the band I3 vmay be made adjustable to three different positions so as to project its jet upwardly, downwardly, or both upwardly and downwardly. For this purpose three sets of screw holes i8 may be provided for theV screws II, as shown in Figure 2. When the screws are placed in the uppermost holes, the

band I3 is shifted upwardly so as to close the opening I6, leaving only one opening I5 adapted to projectr its jet downwardly. Similarly, i1 the screws are placed in the lowermost holes I8, the lower opening I5 will be closed, leaving only 'the' upper opening I6. When the screws I'I are placed in the middle holes I8, the band I3 is supported in the position shown in Figure 2, providing both upper and lower passages I6 and I5, respectively.

This provides a shoe of general utility, which may be used for any one of three different purposes.

In the embodiment shown in Figure 4 the spacer blocks Ill are omitted. The band I9, which corresponds to the bands I3 and I0 in the other figures, is provided with upwardly and downwardly extending lugs 20, adapted to t against the beveled faces I? of the recess 1. These lugs support the band I9 in spaced relation to the bottom of the recess 'I so as to provide circulation space therebeneath, as described for the embodiment of Figures 2 and 3. Between the lugs 29 annularly extending outlet openings 2| are provided to form the annular sheet jets to be projected against the sides of the hole. In

this case, of course, the complete annular jet as.

described for Figure 2 is interrupted by the lugs 26. VThese lugs may, however, be made as narrow as desired, and the openings ZI be lengthened accordingly. Furthermore, any desired number of lugs il may be provided and the number and spacing of the openings 2| may be varied to suit the conditions encountered. In this embodiment, also, the openings 2I may be entirely omitted at either the top or bottom edge of the band I9 so as to provide jets projected only up.u wardly or only downwardly.

In the embodiment of Figure 5 they structure is similar to that of Figure 1, except that a series ofcircumferentially spaced baffles 22 is provided in the recess below the band I6. These baiiles may be inclined, as shown in the drawing, so as to cause the jet issuing from the port II to be projected at a corresponding inclination. baffles may be supported on ther band ill, or on the shell l in the recess l, or in any other suitable manner. Their eiect is to form a spirally directed jet issuing from the port I I. This. tends to cause a swirling movement of the uid in the well.

These It will be seen, therefore, that this invention provides a washing shoe which is adapted to pro.- ject an annular sheet jet either downwardly or upwardly against the hole or in both directions. The projected liquid forms really a conical jet, which reaches practically the entire circumference of the hole and may be constructed so as to discharge any desired volume of liquid. A swirling action jmay be given to the jet, as in the embodiment of Figure 5. The structure lends itself readily to different adjustments for providing diierent kinds of jets, maintaining, however, the annular sheet jet form.

It will be obvious that various changes may be made in the details of construction within the scope'of theappended claims without departing from the spirit vof this invention, and that accordingly the invention is not limited to the specific details shown and described.

The invention having thus been described, what is claimedfis:

1. A well-washing casing shoe adapted for con-V nection with'a casing and comprising, a body provided with a longitudinal fluid passage and with an outer annular recess, saidbody having ports connecting said passage with said recess, a wall of said recess being formed conically to extend axially and radially of said body, and an annular rigid band iixed on and ilush with said body and extending axially part way over said recess, a free end of said band being of conical form to provide with said wall an annular conical jet outlet extending axially `and radially Yof said body.

2` A Well-Washing casing shoe adapted for connection with a casing and comprising, a body provided with a longitudinal fluid passage and with an Vouter annular recess, said body having ports connecting said. passage with said recess, said recess being formed to provide opposed conicall walls each extending axially and radially of said body, an annular rigid band xed on and flush with said body and extending medially part ways over said recess, each free end of said band being of conical form to provide with said walls oppositely directed annular conical jet outlets extending axially and radially of said body.

3'. A well-washing casing shoeV adapted for connection with a casing and comprising', a body provided with a longitudinal fiuid'passa-ge and with anv outer'annular recess, said body having portsV connecting said` passage with said recess, a wallof said recess being formed conically to extend axially and radially of said body, and an annular rigid band fixed on and ush with said body and extending axially part way over said recess, a freeend of said band'v being of conical form to provide-with said wall an annular conical jet outlet lextending axially andV radially of said body, saidY recess having therein a series of ciruiiferentially spaced bales extending along said o y. Y

RALPH A. TIEMANN 

